Rainbow river is awesome dive as well as crystal river, alot of springs along the river to drop off in.
Whats cool about rainbow is you can get in the river up stream and drift dive all the way down till you hit the spring then descend to the springs opening. There is plenty of camping too. At crystal river on the gulf side there are campgrounds. A really good one with boat rentals is at chassahowitzka. You can walk from the camp ground to the river and take a rental boat. There is only one spring at the head of the river but its kinda neat. This time of year if your in almost any part of crystal river you will see manatees, tarpon and redfish. Northwest central florida is a spring and river divers dream come true. I have dove these locations so many times I stopped using a log book. They are like my back yard.